Killing the upsurge of revolutionary spirit (6)

I believe the answer is:

murder

I'm a little stuck... Click here to teach me more about this clue!

'killing' is the definition.
(I know that murder is a type of homicide)

I don't understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for murder that I've seen before include "Red Rum (anag)" , "Kill" , "a number of crows?" , "Deliberate killing" , "Deliberate homicide" .)

I've seen this clue in The Globe and Mail.

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